Dinitrogen Pentoxide

Q. Among the oxides of Nitrogen, the highest and lowest oxidation states for Nitrogen are +5 and +1 respectively – True or False?

1. True
2. False

Q. Explain the following reactions.
(a) Silicon is heated with methyl chloride at high temperature in the presence of copper.
(b) Silicon dioxide is treated with hydrogen fluoride.
(c) CO is heated with ZnO.
(d) Hydrated alumina is treated with aqueous NaOH solution.

Q. Phosphorus pentoxide on reaction with concentrated nitric acid gives dinitrogen pentoxide – True or False?

1. True
2. False

Q. The correct statement(s) about the oxoacids, $HCl{O}_4$ and $HClO$ , is (are)

1. The central atom in both $HCl{O}_4$ and $HClO$ is $s{p}^3$ hybridized
2. $HCl{O}_4$ is formed in the reaction between $C{l}_2$ and $H_{2}O$
3. The conjugate base of $HCl{O}_4$ is weaker base than $H_{2}O$
4. $HCl{O}_4$ is more acidic than $HClO$ because of the resonance stabilization of its anion $HCl{O}_4$ $HClO$

Q.

Which is(are) true about $N_2{O}_5$?

1. It is an anhydride of nitric acid.

2. In solid state, it exists as $N{O}_2^{+}N{O}_3^{-}$

3. It is structurally similar to $P_2{O}_5$

4. It can be prepared by heating $HN{O}_3$ over $P_2{O}_5$

Q. Nitrogen dioxide cannot be obtained by heating:

1. $Pb(N{O}_3{)}_2$
2. $NaN{O}_3$
3. $LiN{O}_3$
4. $KN{O}_3$

Q. The nitrogen containing compound produced in the reaction of $HN{O}_3$ with $P_4{O}_{10}$

1. can also be prepared by reaction of $P_4$ and $HN{O}_3$
2. is diamagnetic
3. contains one N-N bond
4. reacts with Na metal producing a brown gas